Dynamo-electric igniting device



Jan. 13, 1931. K. scHAFFLER-GLOssL 1,738,892

DYNAMO ELECTRIC IGNITING DEVICE Filed Dec. 20, 1929 2 Sheets-Sheet 1 Jam 13, 1931-. K. scHAFFLER-eLOssL 1,783,892

DYNAMO ELECTRIC IGNITING DEVICE Filed Dec. 20. 1929 2 Sheets-Sheet 2 Patented Jan. 13, 1 931 UNITED f STATES xoum scnAFrmn-GLossL, or VI NNA, Ausrnm Dynamo-ELECTRIC IGNITING DEVICE Application filed member 20, 1929, Serial no. 415,534, and in Austria November 9, 1929.

The invention relates to improvements in dynamo electric igniting devices especially mine igniting devices drivenby a spring and has for its purpose to increase the reliability of the device and specifically to prevent the driving spring from being released as long as it is not completely tensioned.

For this purpose two governing or con-' trolling members are provided, one of which 18 connected on the one hand to the winding up mechanism by a unilaterally acting coupling for example a ratchet device and on the other hand to oneend of the driving spring, said member controlling a pawl or the like for locking and releasing the armature driving gear, Whereas the second controlling member is displaced by the first member only in, the end portion of its stroke in order to unlock theusual releasing bolt for the purpose of enabling the driving spring to be released andpreferably also to actuate the contact device of the igniting circuit to be actuated for firing the mines.

The invention further consistsin specific arrangements and structures of the said lock-.

ing and releasing pawl and the checking" member for the releasingbolt.

In the annexed drawings Fig. 1 shows the upper portion of an improved mine ignitingapparatus in a longi tudinal section! Fig. 2 is a top view of the apparatus. Fig. 3 shows merely diagrammatically the driving spring and mechanisms coacting therewith. Figs. 4 and 5 show the locking and releasing pawl in the releasing and locking positions respectively. Figs. 6 and 7 show the said pawl being provided with a tappet holding the'pawl in disengaged position during the time the armature is driven by the driving spring. Figs.-8 and 9 show the two controlling members and the checking lever which'is disengaged from the releasing bolt after the driving spring has been completely tensioned. p

The tension or driving spring 1 which is en closed in a casing 1a is connected to a controlling disk 2. The latter may be provided with an annular groove 2a and with teeth forming a ratchet wheel 20. The usual driving wheel 5 is provided with aratchet pawl 5" engaglimit the movement of the disk 3 directions Fig. 8 shows the position of the p disk 3 is provided with a segmental piece 3a which engages the annular groove 2a of-this controllingdisk 2 and may travel therein. In the disk 2 and within the groove 2a apin 2b is fixed which interrupts said groove 2a.

The two portions Q and 3 form pegs which a p in both disks 2 and'3, when the driving spring 1 has been unwound, i.- e. before the tensioning of the same is commenced.

The driving gear 5 which engages boththe pinion 6 toi driving the armature of the apparatus and the winding up pinion 7 isconnected' or provided with a ratchet gear 4. When the winding up bolt 8 which is connected to the pinion 7, is turned in clockwise direction, the driving gear 5 and the controlling disk 2 is revolved by means of an unilateral coupling for example a ratchet device 5, 2, so thatthe driving spring 1 is wound up. A locking and releasing pawl 9 engaging the ratchet gear 4 prevents the tension spring 1 from unwinding. I

8 During the winding up operation the disk 3 remains in its position, until, after approximately of a complete revolution of the 3 acts on a checking lever 14 which is thereby disengaged from a cam 12 of the releasing bolt '13, so-that the latter is unlocked andthe driving spring may be released by such bolt, i. e. the pawl 9 serving this purpose may be disengaged from the ratchet gear 1 connected to one end of the spring 1 bythe gear .5. But so long as the disk 3 3 does not disengage the checking lever 14 from the cam 12 as is shown in Fig. 8 the driving spring cannotbe released by the bolt 13. In the diagrammatic Fig. 3 the cam like elevation winding up bolt 8, so that the disk 2 is turned in the direction of the arrow ix, the tappet 10 owing to its friction on the disk 2 is moved against the action of its spring in the position shown in Fig. 6, and the pawl 9 is allowed toengage the gear l. 'But in case the pawl 9 is disengaged from the gear ifor the purpose of firing the mines, the tappet 10 is moved by its spring in the position shown in Fig. 7, so as to prop against the abutment 20, and. said tappet holds the pawl 9'in disengaged position (Fig. 7). The spring '1 now unwinds and the disk 2 turns in the direc- .tion of the arrow ,8, the tappet 10 being always held in contact with the abutment 20, so that the pawl 9 is prevented from engaging the rachet gear l during the time the driving spring unwinds. The pawl 9 is not directly connected to the releasing bolt 13 but is moved by a driver 11 by means of an intermediate spring 11 inone direction. By such spring 11 is ensured, that the pawl 9 must always be completely disengaged from the ratchet gear 4 i. e. disengaged to such extent that the tappet 10 bears on vthe abutment 20 (Fig. 7), since in disengaging the pawl 9 from the gear l a large friction due to the rather high pressure of the spring 1 is ,to be overcome, whereby the spring 11 (Fig. tensioned, and as soon as the pawl 9 is disengaged from the ratchet gear 4, so that the latter is released, the pawl 9 will be jerked outwards by the spring 11 against the action of the spring 0 which is less strong than the spring 11, whereby is ensured that the tappct 10 is brought in the propping position shown in Fig. 7. The disk 3 causes by its elevated or cam like portion 3 not only the checking lever 14 to be disengaged from the cam 12 but also the switching in lever 15 (Fig. 2) to be actuated, which in turn acts on the contact device 16, whereby at the end or the phase in which the driving spring 1 is unwound the igniting circuit is opened in the case of an igniting apparatus with series winding and is closed in the case of an ign ting apparatus with shunt winding, i. e. the igniting current is allowed to pass through the igniting circuit. The spring 1 L has for its purpose to force the checking lever 14 to the cam 12.

has for its object to prevent the disk 8 or its cam like portion 3 from being suddenly thrust onto the lever 1%, so that both parts 3, 3" and 14 are prevented from being damaged,

The spring 14 of the lever i l.

the inertia of the disk being taken up by said spring 14 It is repeatedly remarked, that the releasing of the driving spring is only possible, if the same is completely tensioned. The tap pet 10 acts reliably in cooperzd'on with the disk 2, whereas t-l e controlling disk 3 which maybe freely moved over of one revolution 360) enables the disengagement of the pawl 9 from the teeth by the releasing bolt 13, it the disk 8-has disengaged the lever 14; fromthc cam 12. After the driving wheel 5 has performed say 1% revolutions, the driving spring is completely tensit "16d. Then during the unwinding oi the dri.ing spring the disk 3 again lags by 4 of its stroke and actuates the end of its stroke 1the contactdevice 16. That is to ea, the igniting circuit is out in either by clos: f it or by interrupting the usual short circuit. By the spring 11 the pawl 9 is sufficiently lifted for enabling the tappet 10 to prevent the pawl 9 from reeugaging the ratchet That I claim is:

I 1. In a dynam electric igniting device an armature, a geari device, a driving spring for moving said ar ture, a winding up device and a relea g device for such spring, two controlling members, one of which members is connectea to one end oil? said driving spring and to said gearing device by means of aunilaterally acting couplin and serves also to control a checkin' and rem M her for said gearing device, the .econd controlling member being moved by the first named controlling mer her only in the end portion of its stroke for tne purpose of mlocking said re easing device, so that the driving spring is capable of being released by the said releasing device, a contact device included in the igni ing circuit and mean-i for actuating saiu co ,.ct device for tiring.

2. In a dynamo electric igniting device an armature, a gearing device, a driving spring for moving said armature, a winding up device and a releasing device for such spring, two controlling members, one of which members is connected to one end of said driving spring and to said gearing device by means of a unilaterally acting coupling, and serves also to control a checking and releasing member for said gearing device, the second controlling member being moved by the first named controlling member only in the end portion of its stroke for the purpose of unlocking said releasing device, so that the driving spring is capable of being released by the said releasing device, a contact device included in the ignitii'ig circuit, said second controlling member also serving to actuate said contact device for firing.

3. In a dynamo electric igniting device an armature, a gearing device, a driving spring for moving said armature, a winding up device and a releasing device for such spring,

- two controlling members, one of which members is connected to one end of said drivlng spring and to said gearing device by means of a unilaterally acting coupling, and serves also to control a checking and releasing member for said gearing device, a coupling between said two controlling members for the purpose of permitting one of said controlling members to perform a sufiicient idle stroke before the other controlling member is moved for unlocking said releasing device, when the latter is capable of being operated for the purpose of releasing the driving spring.

4. In a dynamo electric igniting device an armature, a gearing device, a driving spring for moving said armature, a winding-up de vice and a releasing device for such spring, two controlling members, one ofwhich memhers is connected to one end of said driving spring and to said gearing device by means of a unilaterally acting coupling, and serves also to control a checking and releasing member for said gearing device, one of the controlling members having'a segmental projection and the second controlling member a pin, said pin extending into the path of the segmental projection, so that the latter may meet such pin for actuating said second controlling member, whereby the said releasing device is unlocked and the latter is capable of being operated for the purpose of releasing the driving spring. y I I V .r

5. In a dynamo electric igniting device an armature, a gearing device, a driving spring for-moving said armature, a winding up device and a releasing device for such'spring,

two controlling members, one of which members is connected to one end of said dr ving spring and to said gearing device by means of a unilaterally acting coupling, and serves also to control a checkmg and releasing member for said gearing device, the second controlling member being moved by the first named controlling member only in the end portion of its stroke for the purpose of unlocking said releasing device, so that the driving springis capable of being released by the said releasing device, resilient means being interposed between the said releasing. device and the said checking member, so that the latter is disengaged by said resilient means from the gearing device, if the releasing device is actuated.

6. In a dynamo electric igniting device an armature, a gearing device, a driving spring for moving said armature, a winding up device and a releasing device for such spring, two controlling members, one of which members is connected to one end of said driving spring and to said gearing device by means of a unilaterally acting coupling, and serves also to control a checkingand releasing member for said gearing device, the second controlling member being moved by the first named controlling member only in the end portion oi ,its stroke; for the purpose of unlocking said sp ing beingless strong than the springfor disengagingsaid pawl;

i 7 In a dynamo electric igniting device an armature, a gearing device,a driving spring for IDOVIHg said armature, a w nding upldevice and a releasing device for such spring,

two controlling members, one of which mem- I hers is connected to one end of said driving springandto said gearingdevice' by means 1 of a unilatcrallyacting coupling, and serves alsoto control. a checking and releasing member 'ifcr said gearing device, the second controlling mcmberbeing moved by the first named controlling member only inthe end portion of itsstrokefor the purpose of un-. locking said releasing device, so that the driving spring can be released by the said releasing device, spring being connected to said releasing device and acting on a pawl forming said checking member so as to disengage tllS'SELIIlG from the gearing device, a spring urged tappet on said pawl coacting with the first named controlling member for maintaining saidpawl in disengaged position when the driving spring unwindsand for allowing said pawl to engage the gearing device when the spring is'wound up.

8. In a dynamo electric igniting'device an armature, a gearing device, a driving spring for moving said armature, a winding up demos and a releasing devicefor such spring,

(r-to force said pawl two controlling members, one of which m,em-

bers is connected to one end of said driving spring and to said gearing device by means of a unilaterally acting coupling, and serves alsotocontrol a checking and releasing member for saidgearing device, the second controlling member being moved by the first named controlling member only in the end portion of its stroke, the said releasing de vice comprising a releasing bolt, a spring urged lever which locks said releasing bolt and is actuated by the second controlling member.

9. Ina dynamo electric igniting device,

an armature, a gearing device, a driving spring for moving said armature, a winding up device and a releasing device for such spring, two controlling members, one of which members is connected to one end of said driving spring and to said gearing device by means of a unilaterally acting coupling, and serves also to control a checking and releasing member for said gearing device, the second controlling member being moved by the first named controlling'memher only in the end portion of its stroke, the said releasing device comprising a releasing bolt, a spring urged lever which looks said releasing bolt and is actuated by the second controlling member and a cushioning device on said lever for compensating shocks exerted by said second cont-rolling member when acting on said lever. r

10. In a dynamo electric igniting devicean armature, a gearing device, a driving spring for moving said armature, a winding up bolt and a releasing bolt for such drivin spring, two controlling disks, one of whic 1 disks is connected to one end of the driving spring and to said gearing device by a uni laterally act-ing coupling, a checking and releasing pawl engaging said gearing device, a spring urged tappet on said pawl cooperating with said first named controlling disk for maintaining such pawl in disengaged position when the driving spring unwinds, the second controlling disk being rotated by the first named controlling member in the terminal portion of its stroke, a lever for checking the releasing belt, which lever is disengaged from said bolt by said second controlling disk.

In witness whereof I aflix my signature.

KONRAD SCHAFFLERGLUSSL. 

